Pentair Quad DE 100 Sq Ft Cartridge Pool Filter | EC-188594Pentair Quad DE 100 Cartridge Style Pool Filter EC 188594 The Pentair Quad DE 100 EC 188594 Cartridge Style Filter offers the perfect balance of diatomaceous earth (DE) filtration clarity and cartridge style convenience. With 100 sq. ft. of filter area, this system is engineered for large residential pools and spas, delivering outstanding water clarity with reduced maintenance requirements. By using four cartridge style DE elements, it combines the